Quarter	Billions of US Dollars
1993-07-01	50.632
1993-10-01	50.025
1994-01-01	50.884
1994-04-01	51.230
1994-07-01	53.228
1994-10-01	52.856
1995-01-01	53.765
1995-04-01	52.967
1995-07-01	54.091
1995-10-01	53.372
1996-01-01	50.926
1996-04-01	51.533
1996-07-01	51.108
1996-10-01	51.650
1997-01-01	51.462
1997-04-01	53.252
1997-07-01	52.954
1997-10-01	53.209
1998-01-01	53.300
1998-04-01	57.350
1998-07-01	59.138
1998-10-01	59.279
1999-01-01	57.163
1999-04-01	59.837
1999-07-01	59.930
1999-10-01	59.079
2000-01-01	58.404
2000-04-01	58.627
2000-07-01	60.571
2000-10-01	60.540
2001-01-01	61.988
2001-04-01	66.506
2001-07-01	69.307
2001-10-01	72.087
2002-01-01	74.491
2002-04-01	75.622
2002-07-01	75.033
2002-10-01	74.587
2003-01-01	76.357
2003-04-01	77.366
2003-07-01	77.552
2003-10-01	81.116
2004-01-01	80.641
2004-04-01	80.859
2004-07-01	82.693
2004-10-01	87.947
2005-01-01	87.546
2005-04-01	87.857
2005-07-01	87.867
2005-10-01	86.749
2006-01-01	85.528
2006-04-01	85.960
2006-07-01	88.688
2006-10-01	92.810
2007-01-01	98.369
2007-04-01	101.188
2007-07-01	105.060
2007-10-01	109.972
2008-01-01	105.664
2008-04-01	113.595
2008-07-01	116.009
2008-10-01	113.999
2009-01-01	117.600
2009-04-01	128.908
2009-07-01	134.231
2009-10-01	135.627
2010-01-01	137.510
2010-04-01	136.781
2010-07-01	144.993
2010-10-01	151.025
2011-01-01	152.802
2011-04-01	156.884
2011-07-01	153.413
2011-10-01	154.781
2012-01-01	159.903
2012-04-01	165.244
2012-07-01	171.216
2012-10-01	179.863
2013-01-01	182.680
2013-04-01	190.401
2013-07-01	196.128
2013-10-01	204.619
2014-01-01	210.913
2014-04-01	215.840
2014-07-01	214.874
2014-10-01	218.259
2015-01-01	229.228
2015-04-01	228.878